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CVE-2026-4800VulnerabilityPublished Updated

Red Hat Security Advisory: pcs security update

Affects Red Hat pcsSource GCVE Database

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Not known to be exploited.

Data as of 30 Oct 2026, 11:52 UTC

Severity
High

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS
2.8% chance of exploitation in 30 days – higher than 86% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    Public exploit code: GitHub proofs of concept

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

AI-suggested

Red Hat has released updated pcs packages that fix this vulnerability. Users should apply the provided security update for pcs as detailed in Red Hat advisory RHSA-2026:11470 and the referenced article https://access.redhat.com/articles/11258. Applying this update mitigates the risk by addressing the lodash arbitrary code execution flaw.

Description

A security update for the pcs packages in Red Hat Enterprise Linux addresses a vulnerability in lodash (CVE-2026-4800) that allows arbitrary code execution via untrusted input in template imports. The pcs packages are used for command-line configuration of Pacemaker and Corosync utilities. This vulnerability is rated as having an important security impact by Red Hat.

References

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